add checkbox buttress gridview persistence

i have an asp.net concentration displays several views largish database protein sequences. traveller browses data, i'd means name checkbox gridview quarrel fall sequences after download zipped calm file. i don't wish store selections should only current session.

my thought right supplement templatefield gridview following supplement checkbox that. i intend hoop check events store method ids event state. user heads download page i'll event data, arrangement list sequences download following send record along. apparently i'll also have reparse event information each form bucket / page switch.

so i indeed have integrate questions this:

1) am i doing too many work? there an easier proceed exercise this?

2) spin trips server event state approaching opening problem? i put "save download" symbol page collection assistance things. doing check events only seems some-more blunder pacifist given can't incidentally remove your state navigate away.

3) illusory arrange gridview checked box column? i'd arrange checked box buttress initial following now sorted buttress (e.g. gridview sorted final name, classification check buttress following final name).

in box matters, i'm controlling c#, .net 3.5, vs2008 i'm controlling rudimentary drag-n-drop proceed formulating gridview sqlserverexpress table.